Table and chair frame capable of being stored

Abstract

The utility model relates to the technical field of tables and chairs, particularly provides a table and chair frame capable of being stored, and aims to solve the problem that tables and chairs in the prior art are inconvenient to carry and carry due to large sizes. The device comprises an upper supporting assembly, a lower support assembly; the lower portion of the center shaft assembly is connected with the lower supporting assembly through a lower linkage assembly. And a spiral seat is rotationally arranged at the upper part, is connected with the lower supporting assembly through a spiral structure, and is connected with the upper supporting assembly through an upper linkage assembly. When the center shaft assembly ascends, the spiral base drives the upper supporting assembly to contract through the upper linkage assembly, the center shaft assembly drives the lower supporting assembly to contract through the lower linkage assembly, and the table and chair frame is stored. When the center shaft assembly descends, the spiral base drives the upper supporting assembly to be unfolded through the upper linkage assembly, the center shaft assembly drives the lower supporting assembly to be unfolded through the lower linkage assembly, and the upper supporting assembly can support the table top to be used for containing objects. Or the upper support assembly can support the seat surface for the rest of the user.

Description

Technical Field

[0001] The utility model belongs to the technical field of tables and chairs, and particularly relates to a foldable table and chair frame. Background Art

[0002] Tables and chairs are common furniture in everyday life, used for work, study, dining, and rest. They are used in many situations, such as camping, travel, and meetings. However, most tables and chairs are bulky or heavy because their legs and support surfaces are integrated. This makes them inconvenient to carry and transport, and they also take up a lot of space. Therefore, large and bulky tables and chairs are not convenient for these activities, but rather limit their flexibility and hinder their execution. Utility Model Content

[0003] The utility model provides a foldable table and chair frame, aiming to solve the problem in the prior art that the tables and chairs are large in size and thus inconvenient to carry and transport.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] In a first aspect, the present invention provides a retractable table and chair frame, comprising:

[0006] Upper support assembly;

[0007] Lower support assembly;

[0008] The lower part of the central shaft assembly is connected to the lower support assembly through a lower linkage assembly; the upper part of the central shaft assembly is rotatably provided with a spiral seat, and the spiral seat is connected to the lower support assembly through a spiral structure, and the spiral seat is connected to the upper support assembly through an upper linkage assembly;

[0009] When the central shaft assembly rises, the spiral seat drives the upper support assembly to retract through the upper linkage assembly, and the central shaft assembly drives the lower support assembly to retract through the lower linkage assembly;

[0010] When the central shaft assembly descends, the spiral seat drives the upper support assembly to unfold through the upper linkage assembly, and the central shaft assembly drives the lower support assembly to unfold through the lower linkage assembly.

[0011] A further solution: the central shaft assembly includes a central shaft passing through the middle of the upper support assembly and the lower support assembly, the spiral seat is arranged at the upper end of the central shaft, and the spiral seat and the central shaft are fixed in the axial direction and rotate relative to each other in the circumferential direction; the rise or fall of the central shaft drives the spiral seat to rise or fall.

[0012] Based on the above solution, the spiral seat and the central shaft are fixed in the axial direction, so that the central shaft and the spiral seat can rise or fall synchronously. The spiral seat and the central shaft rotate relative to each other in the circumferential direction, so that when the spiral seat rotates helically, the central shaft can be prevented from rotating synchronously, thereby preventing the central shaft from driving the sliding seat to rotate.

[0013] A further solution: the lower support assembly includes a fixed seat and a cylinder fixed in the middle of the fixed seat; the central axis is arranged in the cylinder, and the spiral seat is sleeved on the upper part of the cylinder through the spiral structure;

[0014] When the central shaft rises or falls, the spiral seat spirally rises or falls on the cylinder through the spiral structure.

[0015] Based on the above solution, the spiral seat is sleeved on the upper part of the cylinder and is lifted and lowered in a spiral along the upper part of the cylinder, which can improve the stability of the spiral seat during the spiral lifting and lowering.

[0016] A further solution: the spiral structure includes a spiral protrusion arranged on the upper part of the outer wall of the cylinder and a spiral groove arranged on the inner wall of the spiral seat, and the spiral protrusion is slidably arranged in the spiral groove.

[0017] Based on the above solution, the spiral protrusion and the spiral groove cooperate with each other to enable the spiral seat to be spirally lifted and lowered; in addition, the process structure of the spiral protrusion and the spiral groove is relatively simple and has good stability.

[0018] A further solution: a sliding seat is provided at the lower portion of the central shaft, and the sliding seat and the central shaft are fixed in the axial direction;

[0019] The sliding seat is slidably arranged at the lower part of the cylinder and is located at the lower end of the fixed seat; when the central shaft rises and falls, the central shaft drives the sliding seat to slide up and down at the lower part of the cylinder.

[0020] Based on the above scheme, the lower end of the central shaft is connected to the sliding seat, and the upper end is connected to the spiral seat, so that when the central shaft rises or falls, the sliding seat and the spiral seat are driven to rise or fall at the same time, thereby being able to simultaneously realize the contraction or expansion of the lower support frame assembly and the upper support frame assembly.

[0021] A further solution: the lower support assembly further includes a lower support frame assembly, and the lower support frame assembly includes a stowed state and an expanded state;

[0022] The lower linkage assembly is arranged between the sliding seat and the lower support frame assembly; when the sliding seat rises or falls, the sliding seat drives the lower support frame assembly to switch between the storage state and the deployment state through the lower linkage assembly.

[0023] Based on the above solution, when the sliding seat rises, the end of the lower linkage assembly connected to the lower support frame assembly gradually approaches the sliding seat, thereby driving the lower support frame assembly to retract, thereby realizing the conversion of the lower support frame assembly from the deployed state to the retracted state. When the sliding seat descends, the end of the lower linkage assembly connected to the lower support frame assembly gradually moves away from the sliding seat, thereby driving the lower support frame assembly to deploy, thereby realizing the conversion of the lower support frame assembly from the retracted state to the deployed state.

[0024] A further solution: a spring is sleeved on the lower part of the cylinder to keep the lower support frame assembly in the expanded state, the upper end of the spring is connected to the fixed seat, and the lower end is connected to the sliding seat; when the lower support frame assembly is retracted, the sliding seat rises and the spring is compressed.

[0025] Based on the above solution, the spring keeps the lower support assembly in the expanded state, making it convenient for users to use the table and chair frame.

[0026] A further solution: the lower support frame assembly includes at least three lower support legs hinged to the fixed seat; the lower linkage assembly includes at least three lower linkage rods corresponding to the lower support legs one by one, one end of each lower linkage rod is hinged to the sliding seat, and the other end is hinged to the corresponding lower support leg;

[0027] When the sliding seat rises or falls, the sliding seat drives the corresponding lower supporting legs to contract or expand through the lower linkage rod.

[0028] Based on the above solution, three or more lower supporting legs can provide good stability when the lower supporting frame assembly is in the expanded state.

[0029] A further solution: the upper support assembly includes a rotating seat and an upper support frame assembly; the rotating seat is rotatably arranged above the fixed seat, and the cylinder passes through the rotating seat, and the spiral seat is located at the upper end of the rotating seat;

[0030] The upper support frame assembly includes an expanded state and a retracted state, and the upper linkage assembly is arranged between the spiral seat and the upper support frame assembly;

[0031] When the spiral seat spirally rises or spirally descends, the spiral seat drives the rotating seat to rotate through the upper linkage assembly and drives the upper support frame assembly to switch between the expanded state and the stored state.

[0032] Based on the above scheme, the rotatable rotating seat cooperates with the spiral seat, so that when the spiral seat is spirally raised and lowered, the spiral seat drives the upper linkage assembly to rotate, and the rotation of the rotating seat drives the upper support frame assembly to rotate, thereby making the upper linkage assembly and the upper support frame assembly in a relatively static state, so that the upper linkage assembly can drive the upper support frame assembly to contract or expand.

[0033] A further solution: the upper support frame assembly includes at least three upper support legs hinged to the rotating seat; the upper linkage assembly includes at least three upper linkage rods corresponding to the upper support legs, one end of each upper linkage rod is hinged to the spiral seat, and the other end is hinged to the corresponding upper support leg;

[0034] When the spiral seat rises or falls, the spiral seat drives the corresponding upper supporting leg to contract or expand through the upper linkage rod.

[0035] Based on the above solution, three or more upper supporting legs can provide good stability when the upper supporting frame assembly is in the expanded state.

[0036] A further solution: the upper surface of the fixed seat is provided with a lower positioning groove and a lower sliding groove opening upward, and a ball is provided in the lower positioning groove; the lower surface of the rotating seat is provided with an upper positioning groove and an upper sliding groove opening downward, and a ball is provided in the upper positioning groove;

[0037] When the rotating seat rotates relative to the fixed seat, the balls in the lower positioning groove slide in the upper sliding groove, and the balls in the upper positioning groove slide in the lower sliding groove.

[0038] Based on the above solution, the balls in the lower positioning groove and the balls in the upper positioning groove convert sliding friction into rolling friction when the rotating seat rotates relative to the fixed seat, thereby reducing frictional resistance.

[0039] In a second aspect, the present invention provides a retractable table and chair frame, comprising:

[0040] Upper support assembly;

[0041] Lower support assembly;

[0042] The upper part of the central shaft assembly is connected to the upper support assembly through an upper linkage assembly; the lower part of the central shaft assembly is rotatably provided with a spiral seat, and the spiral seat is connected to the upper support assembly through a spiral structure, and the spiral seat is connected to the lower support assembly through a lower linkage assembly;

[0043] When the central shaft assembly descends, the spiral seat drives the lower support assembly to retract through the lower linkage assembly, and the central shaft assembly drives the upper support assembly to retract through the upper linkage assembly;

[0044] When the central shaft assembly rises, the spiral seat drives the lower support assembly to unfold through the lower linkage assembly, and the central shaft assembly drives the upper support assembly to unfold through the upper linkage assembly.

[0045] The beneficial effects of the utility model are:

[0046] The present invention can achieve the synchronous contraction of the upper and lower support assemblies by raising the central axis assembly, so that the table and chair frame can be stored, making the volume of the table and chair frame smaller and more convenient for users to carry or carry, thereby improving the portability of the present invention; and it does not take up too much space, making it convenient for storage. In addition, when using the present invention, the upper and lower support assemblies can be synchronously deployed by lowering the central axis assembly; the upper support assembly can support the tabletop for placing items; or the upper support assembly can support the seat surface for users to rest.

[0047] In the first aspect, when the central axis assembly rises, the central axis assembly drives the lower support assembly to retract via the lower linkage assembly; the spiral seat spirally rises via the spiral structure, and the spiral seat drives the upper support assembly to retract via the upper linkage assembly, thereby achieving synchronous retraction of the upper and lower support assemblies, and the table and chair frame is stored. When the central axis assembly descends, the central axis assembly drives the lower support assembly to expand via the lower linkage assembly; the spiral seat spirally descends via the spiral structure, and the spiral seat drives the upper support assembly to expand via the upper linkage assembly, thereby achieving synchronous expansion of the upper and lower support assemblies, convenient for users.

[0048] Alternatively, in the second aspect, when the central axis assembly descends, the central axis assembly drives the upper support assembly to retract via the upper linkage assembly; the spiral seat spirally descends via the spiral structure, and the spiral seat drives the lower support assembly to retract via the lower linkage assembly, thereby achieving synchronous retraction of the upper and lower support assemblies, and the table and chair frame is stored. When the central axis assembly ascends, the central axis assembly drives the upper support assembly to expand via the upper linkage assembly; the spiral seat spirally ascends via the spiral structure, and the spiral seat drives the lower support assembly to expand via the lower linkage assembly, thereby achieving synchronous expansion of the upper and lower support assemblies, which is convenient for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0050] Figure 1 This is a structural diagram of a retractable table and chair frame of the utility model;

[0051] Figure 2 It is a cross-sectional schematic diagram of a retractable table and chair frame of the utility model;

[0052] Figure 3 It is a structural diagram of the upper support assembly in the utility model;

[0053] Figure 4 It is a structural diagram of the lower support assembly of the utility model;

[0054] Figure 5 It is a structural diagram of the central axis component of the utility model.

[0055] Description of the numbers in the figure:

[0056] 1-rotating seat; 11-upper supporting leg mounting slot; 12-upper positioning slot; 13-upper sliding slot; 2-upper supporting leg; 21-upper linkage rod clearance slot; 3-upper linkage rod; 4-fixed seat; 41-lower positioning slot; 42-lower supporting leg mounting slot; 43-cylinder; 431-spiral protrusion; 432-fixing bolt; 44-spring; 45-lower sliding slot; 5-lower supporting leg; 51-lower linkage rod clearance slot; 6-lower linkage rod; 7-center axis; 71-spiral seat; 711-spiral slot; 712-upper linkage rod hinge slot; 72-sliding seat; 721-lower linkage rod hinge slot. DETAILED DESCRIPTION

[0057] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. Example

[0058] like Figure 1 and Figure 2 As shown, this embodiment provides a retractable table and chair frame, comprising:

[0059] Upper support assembly;

[0060] Lower support assembly;

[0061] The lower part of the central shaft assembly is connected to the lower support assembly through a lower linkage assembly; the upper part of the central shaft assembly is rotatably provided with a spiral seat 71, and the spiral seat 71 is connected to the lower support assembly through a spiral structure, and the spiral seat 71 is connected to the upper support assembly through an upper linkage assembly;

[0062] When the central shaft assembly rises, the spiral seat 71 drives the upper support assembly to retract through the upper linkage assembly, and the central shaft assembly drives the lower support assembly to retract through the lower linkage assembly;

[0063] When the central shaft assembly descends, the spiral seat 71 drives the upper support assembly to unfold through the upper linkage assembly, and the central shaft assembly drives the lower support assembly to unfold through the lower linkage assembly.

[0064] A more specific example of the above solution is:

[0065] like Figure 1 and Figure 5 As shown, the central shaft assembly includes a central shaft 7 passing through the middle of the upper support assembly and the lower support assembly, the spiral seat 71 is arranged at the upper end of the central shaft 7, and the spiral seat 71 and the central shaft 7 are fixed in the axial direction and rotate relative to each other in the circumferential direction; the rise or fall of the central shaft 7 drives the spiral seat 71 to rise or fall.

[0066] As one of the connection structures between the spiral seat 71 and the central shaft 7, a specific structure is as follows: a through hole is provided on the spiral seat 71, and a thread is provided on the upper end of the central shaft 7. The thread passes through the through hole, so that the central shaft 7 and the spiral seat 71 can be fixed in the axial direction and rotate relative to each other in the circumferential direction.

[0067] like Figure 4 As shown, the lower support assembly includes a fixing seat 4 and a cylinder 43 fixed in the middle of the fixing seat 4; the central shaft 7 is inserted into the cylinder 43, and the spiral seat 71 is sleeved on the upper part of the cylinder 43 through the spiral structure;

[0068] When the central shaft 7 rises or falls, the spiral seat 71 spirally rises or falls on the cylinder 43 through the spiral structure.

[0069] The middle part of the fixing seat 4 is a hollow structure; Figure 2 As shown, in order to achieve the fixed arrangement of the cylinder 43 in the fixing seat 4, the following schemes are included but not limited to: the cylinder 43 is arranged in the hollow structure, and a fixing column or a fixing bolt 432 passes through the fixing seat 4 and the cylinder 43 from the side of the fixing seat 4, thereby fixing the cylinder 43 inside the fixing seat 4.

[0070] As a preferred option, Figure 4 and Figure 5 As shown, the spiral structure includes a spiral protrusion 431 provided on the upper portion of the outer wall of the cylinder 43 and a spiral groove 711 provided on the inner wall of the spiral seat 71. The spiral protrusion 431 is slidably disposed in the spiral groove 711. It should be noted that in addition to the spiral protrusion 431 and spiral groove 711 described above, the spiral structure can also be configured as other structures. As long as the spiral seat 71 can be spirally ascended or descended relative to the cylinder 43, it is within the scope of protection of this application.

[0071] Based on any of the above solutions, Figure 5 As shown, a sliding seat 72 is provided at the lower portion of the central shaft 7, and the sliding seat 72 and the central shaft 7 are fixed in the axial direction; wherein, the connection method between the sliding seat 72 and the central shaft 7 is the same as the connection method between the spiral seat 71 and the central shaft 7, that is, a through hole is provided on the sliding seat 72, and a thread is provided at the lower end of the central shaft 7, and the thread passes through the through hole.

[0072] The sliding seat 72 is slidably arranged at the lower part of the cylinder 43 and is located at the lower end of the fixed seat 4; when the central shaft 7 rises and falls, the central shaft 7 drives the sliding seat 72 to slide up and down at the lower part of the cylinder 43.

[0073] On the basis of any of the above solutions, the lower support assembly further includes a lower support frame assembly, and the lower support frame assembly includes a stowed state and an expanded state;

[0074] like Figure 2As shown, the lower linkage assembly is arranged between the sliding seat 72 and the lower support frame assembly; when the sliding seat 72 rises, the sliding seat 72 drives the lower support frame assembly from the deployed state to the retracted state through the lower linkage assembly; when the sliding seat 72 descends, the sliding seat 72 drives the lower support frame assembly from the retracted state to the deployed state through the lower linkage assembly;

[0075] In addition, a spring 44 is sleeved on the lower part of the cylinder 43 for keeping the lower support frame assembly in the expanded state. The upper end of the spring 44 is connected to the fixed seat 4, and the lower end is connected to the sliding seat 72. When the lower support frame assembly is retracted, the sliding seat 72 rises and the spring 44 is compressed.

[0076] A specific example of the lower support frame assembly is as follows: the lower support frame assembly includes at least three lower support legs 5 hinged to the fixed base 4; the lower linkage assembly includes at least three lower linkage rods 6 corresponding to the lower support legs 5, one end of each lower linkage rod 6 is hinged to the sliding base 72, and the other end is hinged to the corresponding lower support leg 5;

[0077] When the sliding seat 72 rises or falls, the sliding seat 72 drives the corresponding lower supporting leg 5 to contract or expand through the lower linkage rod 6 .

[0078] Specifically, the edge of the fixing seat 4 is provided with a plurality of lower supporting leg mounting grooves 42 corresponding to the lower supporting legs 5, and each of the lower supporting legs 5 is provided with a hinged end, and the hinged end on each of the lower supporting legs 5 is respectively arranged in the corresponding lower supporting leg mounting groove 42, and a rotating shaft passes through the lower supporting leg mounting groove 42 and the hinged end to realize the hinged structure between each lower supporting leg 5 and the fixing seat 4.

[0079] The sliding seat 72 is provided with a plurality of lower linkage rod hinge slots 721 corresponding to the lower linkage rod 6. One end of the lower linkage rod 6 is inserted into the lower linkage rod hinge slot 721, and a rotating shaft passes through the lower linkage rod hinge slot 721 and the lower linkage rod 6, thereby realizing a hinged structure between the lower linkage rod 6 and the sliding seat 72. Each of the lower support legs 5 is provided with a lower linkage rod clearance slot 51. The other end of the lower linkage rod 6 passes through the lower linkage rod clearance slot 51, and a rotating shaft passes through the lower support leg 5 and the lower linkage rod 6, thereby realizing a hinged structure between the lower linkage rod 6 and the lower support leg 5.

[0080] In addition, the number of the lower supporting legs 5 can be set to three, four, or five. The number of the lower linking rods 6 can be set to three, four, or five. In this embodiment, the number of the lower supporting legs 5 is set to four, and the number of the lower linking rods 6 corresponds to the number of the lower supporting legs 5, that is, the number of the lower linking rods 6 is also set to four.

[0081] like Figure 3 and Figure 4 As shown, a more specific example of the upper support assembly is as follows: the upper support assembly includes a rotating base 1 and an upper support frame assembly; the rotating base 1 is rotatably arranged above the fixed base 4, and the cylinder 43 passes through the rotating base 1, and the spiral base 71 is located at the upper end of the rotating base 1;

[0082] The upper support frame assembly includes an expanded state and a retracted state, and the upper linkage assembly is arranged between the spiral seat 71 and the upper support frame assembly;

[0083] When the spiral seat 71 spirals upward, the spiral seat 71 drives the rotating seat 1 to rotate through the upper linkage assembly and drives the upper support frame assembly to switch from the deployed state to the retracted state; when the spiral seat 71 spirals downward, the spiral seat 71 drives the rotating seat 1 to rotate in the opposite direction through the upper linkage assembly and drives the upper support frame assembly to switch from the retracted state to the deployed state. The reverse rotation means that the direction of rotation of the rotating seat 1 when the spiral seat 71 spirals downward is opposite to the direction of rotation of the rotating seat 1 when the spiral seat 71 spirals upward.

[0084] The upper support frame assembly includes at least three upper support legs 2 hinged to the rotating base 1, and each of the upper support legs 2 can be telescopically extended; the upper linkage assembly includes at least three upper linkage rods 3 corresponding to the upper support legs 2, and one end of each upper linkage rod 3 is hinged to the spiral base 71, and the other end is hinged to the corresponding upper support leg 2;

[0085] When the spiral seat 71 rises or falls, the spiral seat 71 drives the corresponding upper supporting leg 2 to contract or expand through the upper linkage rod 3 .

[0086] Specifically, the edge of the rotating base 1 is provided with a plurality of upper support leg mounting grooves 11 corresponding to the upper support legs 2, and each of the upper support legs 2 is provided with a hinged end, and the hinged end on each of the upper support legs 2 is respectively arranged in the corresponding upper support leg mounting groove 11, and a rotating shaft passes through the upper support leg mounting groove 11 and the hinged end to realize the hinged structure between each upper support leg 2 and the rotating base 1.

[0087] The spiral seat 71 is provided with a plurality of upper linkage rod hinge slots 712 corresponding to the upper linkage rod 3. One end of the upper linkage rod 3 is inserted into the upper linkage rod hinge slot 712, and a rotating shaft passes through the upper linkage rod hinge slot 712 and the upper linkage rod 3, thereby realizing a hinged structure between the upper linkage rod 3 and the spiral seat 71. Each of the upper support legs 2 is provided with an upper linkage rod clearance slot 21. The other end of the upper linkage rod 3 passes through the upper linkage rod clearance slot 21, and a rotating shaft passes through the upper support leg 2 and the upper linkage rod 3, thereby realizing a hinged structure between the upper linkage rod 3 and the upper support leg 2.

[0088] In addition, when the upper support assembly supports the table top, the number of the upper support legs 2 is set to at least three, and the lengths of the upper support legs 2 are all the same to prevent the table top from tilting; the number of the upper linkage rods 3 is also set to at least three, and corresponds to the number of the upper support legs 2.

[0089] When the upper support frame assembly supports the seat surface, the number of the upper support legs 2 can be set to four, wherein the length of any two adjacent upper support legs 2 needs to be greater than the length of the other two upper support legs 2 to serve as a backrest; the number of the upper linkage rods 3 is also set to four, and corresponds one-to-one to the upper support legs 2.

[0090] On the basis of any of the above solutions, in order to make the rotating seat 1 easier to rotate relative to the fixed seat 4, the following solutions are included but not limited to: the upper surface of the fixed seat 4 is provided with a lower positioning groove 41 and a lower sliding groove 45 opening upward, and a ball is provided in the lower positioning groove 41; the lower surface of the rotating seat 1 is provided with an upper positioning groove 12 and an upper sliding groove 13 opening downward, and a ball is provided in the upper positioning groove 12;

[0091] When the rotating seat 1 rotates relative to the fixed seat 4 , the balls in the lower positioning groove 41 slide in the upper sliding groove 13 , and the balls in the upper positioning groove 12 slide in the lower sliding groove 45 .

[0092] A specific example of the above solution is as follows: there are three lower positioning grooves 41, and the lower sliding groove 45 is arc-shaped; there are three upper positioning grooves 12, and the upper sliding groove 13 is arc-shaped. The positions of the three lower positioning grooves 41 on the fixed base 4 correspond to the positions of the upper sliding grooves 13 on the rotating base 1; and the positions of the three upper positioning grooves 12 on the rotating base 1 correspond to the positions of the lower sliding grooves 45 on the fixed base 4.

[0093] A ball is disposed in each of the lower positioning grooves 41, and a ball is disposed in each of the upper positioning grooves 12. When the rotating base 1 rotates relative to the fixed base 4, the ball in each of the lower positioning grooves 41 slides in the upper sliding groove 13, and the ball in each of the upper positioning grooves 12 slides in the lower sliding groove 45. Example

[0094] This embodiment provides a retractable table and chair frame that is an upside-down version of the first embodiment described above, comprising:

[0095] Upper support assembly;

[0096] Lower support assembly;

[0097] The upper part of the central shaft assembly is connected to the upper support assembly through an upper linkage assembly; the lower part of the central shaft assembly is rotatably provided with a spiral seat 71, and the spiral seat 71 is connected to the upper support assembly through a spiral structure, and the spiral seat 71 is connected to the lower support assembly through a lower linkage assembly;

[0098] When the central shaft assembly descends, the spiral seat 71 drives the lower support assembly to retract through the lower linkage assembly, and the central shaft assembly drives the upper support assembly to retract through the upper linkage assembly;

[0099] When the central shaft assembly rises, the spiral seat 71 drives the lower support assembly to unfold through the lower linkage assembly, and the central shaft assembly drives the upper support assembly to unfold through the upper linkage assembly.

[0100] The following is an example of the working principle of the present invention, which is further described below:

[0101] The lower support leg 5 is retracted, and the lower support leg 5 drives the sliding seat 72 and the central axis 7 to rise through the lower linkage rod 6. The spiral seat 71 spirally rises under the spiral structure. The spiral seat 71 drives the upper support leg 2 to retract through the upper linkage rod 3 when the rotating seat 1 rotates, thereby storing the table and chair frame.

[0102] The lower support leg 5 is unfolded, and the lower support leg 5 drives the sliding seat 72 and the central axis 7 to descend through the lower connecting rod 6. The spiral seat 71 spirally descends under the spiral structure. The spiral seat 71 drives the upper support leg 2 to unfold through the upper connecting rod 3 when the rotating seat 1 rotates in the opposite direction, thereby unfolding the table and chair frame.

[0103] The present invention is not limited to the above optional implementation methods. Under the premise of not conflicting with each other, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the scope of protection of the present invention.

Claims

1. A retractable table and chair frame, characterized in that: include: Upper support assembly; Lower support assembly; The lower part of the central shaft assembly is connected to the lower support assembly through a lower linkage assembly; the upper part of the central shaft assembly is rotatably provided with a spiral seat, and the spiral seat is connected to the lower support assembly through a spiral structure, and the spiral seat is connected to the upper support assembly through an upper linkage assembly; When the central shaft assembly rises, the spiral seat drives the upper support assembly to retract through the upper linkage assembly, and the central shaft assembly drives the lower support assembly to retract through the lower linkage assembly; When the central shaft assembly descends, the spiral seat drives the upper support assembly to unfold through the upper linkage assembly, and the central shaft assembly drives the lower support assembly to unfold through the lower linkage assembly.

2. The retractable table and chair frame according to claim 1, characterized in that: The central shaft assembly includes a central shaft passing through the middle of the upper support assembly and the lower support assembly, the spiral seat is arranged at the upper end of the central shaft, and the spiral seat and the central shaft are fixed in the axial direction and rotate relative to each other in the circumferential direction; the central shaft rises or falls, driving the spiral seat to rise or fall.

3. The retractable table and chair frame according to claim 2, characterized in that: The lower support assembly includes a fixed seat and a cylinder fixed in the middle of the fixed seat; the central shaft is arranged in the cylinder, and the spiral seat is sleeved on the upper part of the cylinder through the spiral structure; When the central shaft rises or falls, the spiral seat spirally rises or falls on the cylinder through the spiral structure.

4. The retractable table and chair frame according to claim 3, characterized in that: The spiral structure includes a spiral protrusion arranged on the upper part of the outer wall of the cylinder and a spiral groove arranged on the inner wall of the spiral seat, and the spiral protrusion is slidably arranged in the spiral groove.

5. The retractable table and chair frame according to claim 3, characterized in that: A sliding seat is provided at the lower portion of the central shaft, and the sliding seat and the central shaft are fixed in the axial direction; The sliding seat is slidably arranged at the lower part of the cylinder and is located at the lower end of the fixed seat; when the central shaft rises and falls, the central shaft drives the sliding seat to slide up and down at the lower part of the cylinder.

6. The retractable table and chair frame according to claim 5, characterized in that: The lower support assembly further includes a lower support frame assembly, and the lower support frame assembly includes a stowed state and an expanded state; The lower linkage assembly is arranged between the sliding seat and the lower support frame assembly; when the sliding seat rises or falls, the sliding seat drives the lower support frame assembly to switch between the storage state and the deployment state through the lower linkage assembly.

7. The retractable table and chair frame according to claim 6, characterized in that: The lower part of the cylinder is sleeved with a spring for keeping the lower support frame assembly in the expanded state. The upper end of the spring is connected to the fixed seat, and the lower end is connected to the sliding seat. When the lower support frame assembly is retracted, the sliding seat rises and the spring is compressed.

8. The retractable table and chair frame according to claim 6, characterized in that: The lower support frame assembly includes at least three lower support legs hinged to the fixed seat; the lower linkage assembly includes at least three lower linkage rods corresponding to the lower support legs one by one, one end of each lower linkage rod is hinged to the sliding seat, and the other end is hinged to the corresponding lower support leg; When the sliding seat rises or falls, the sliding seat drives the corresponding lower supporting legs to contract or expand through the lower linkage rod.

9. The retractable table and chair frame according to claim 3, characterized in that: The upper support assembly includes a rotating seat and an upper support frame assembly; the rotating seat is rotatably arranged above the fixed seat, and the cylinder passes through the rotating seat, and the spiral seat is located at the upper end of the rotating seat; The upper support frame assembly includes an expanded state and a retracted state, and the upper linkage assembly is arranged between the spiral seat and the upper support frame assembly; When the spiral seat spirally rises or spirally descends, the spiral seat drives the rotating seat to rotate through the upper linkage assembly and drives the upper support frame assembly to switch between the expanded state and the stored state.

10. The retractable table and chair frame according to claim 9, characterized in that: The upper support frame assembly includes at least three upper support legs hinged to the rotating seat; the upper linkage assembly includes at least three upper linkage rods corresponding to the upper support legs one by one, one end of each upper linkage rod is hinged to the spiral seat, and the other end is hinged to the corresponding upper support leg; When the spiral seat rises or falls, the spiral seat drives the corresponding upper supporting leg to contract or expand through the upper linkage rod.

11. The retractable table and chair frame according to claim 9, characterized in that: The upper surface of the fixed seat is provided with a lower positioning groove and a lower sliding groove opening upward, and a ball is provided in the lower positioning groove; the lower surface of the rotating seat is provided with an upper positioning groove and an upper sliding groove opening downward, and a ball is provided in the upper positioning groove; When the rotating seat rotates relative to the fixed seat, the balls in the lower positioning groove slide in the upper sliding groove, and the balls in the upper positioning groove slide in the lower sliding groove.

12. A retractable table and chair frame, characterized in that: include: Upper support assembly; Lower support assembly; The upper part of the central shaft assembly is connected to the upper support assembly through an upper linkage assembly; the lower part of the central shaft assembly is rotatably provided with a spiral seat, and the spiral seat is connected to the upper support assembly through a spiral structure, and the spiral seat is connected to the lower support assembly through a lower linkage assembly; When the central shaft assembly descends, the spiral seat drives the lower support assembly to retract through the lower linkage assembly, and the central shaft assembly drives the upper support assembly to retract through the upper linkage assembly; When the central shaft assembly rises, the spiral seat drives the lower support assembly to unfold through the lower linkage assembly, and the central shaft assembly drives the upper support assembly to unfold through the upper linkage assembly.

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